1. Université de Paris, Centre of Research Epidemiology and Statistics (CRESS), INSERM, INRA, F-75004; Paris France
2. Cochrane France; Paris France
3. School of Nursing and Midwifery; National University of Ireland Galway; Galway Ireland
4. Institute for Evidence in Medicine; Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg; Freiburg Germany
5. Cochrane Germany; Cochrane Germany Foundation; Freiburg Germany
6. Department of Internal Medicine and Evidence-Based Healthcare Program, Faculty of Medicine; Pontificia Universidad Católica de Chile; Santiago Chile
7. Centre for Evidence-Based Medicine Odense (CEBMO); Odense University Hospital; Odense Denmark
8. Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico; University of Milan; Milan Italy